GT2560 V4 Connections for Installing Bootloader

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GT2560 V4 Connections for Installing Bootloader

Post by lmcmulle » Sun Dec 15, 2019 12:18 am


Can someone share a photo of how to connect a Arduino Uno to the GT2560 V4 Board to use the uno as a programmer? My board doesn't have a boot loader installed on it, and i need to flash the firmware to enable 3dtouch.



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Re: GT2560 V4 Connections for Installing Bootloader

Post by William » Sun Dec 15, 2019 4:43 pm

Hi, You can try to download the firmware of hex on the official website, and then upload it using the firmware kit,

For specific operation methods, please refer to this: ... 20&t=69705

If there is an error, please refer to this: ... 20&t=69684
-Keep your mind and try to test it. :)
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-You can ask me the questions and I will kindly reply.
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Re: GT2560 V4 Connections for Installing Bootloader

Post by lmcmulle » Mon Dec 16, 2019 12:03 am

THE PROBLEM is that many of the A20T's were shipped without a bootloader, so you can't flash the firmware AT ALL.

I'm asking specifically about how to connect a Ardunio Nano board to the Gt2560 V4 Board to use the Nano as a programmer, so that I can install a boot loader. Can someone share the proper pins to use on the GT2560 V4 Board?

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Re: GT2560 V4 Connections for Installing Bootloader

Post by Volans » Sun Feb 16, 2020 10:59 am

EXACTLY my question too.

Vert says here to "press and hold reset when you flash..." PLEASE CLARIFY this statement
Do you mean hold down the reset during the entire upload process and don't release until it completes? I haven't been doing that part.
Guess I will try to begin holding the reset button before I hit the update button, continue to hold the button throughout the upload process and release the button when upload completes.

William, the firmware kit is no better for those of us with this problem. It doesn't work for me. And I don't think it said specifically to hold reset on instructions I have found using the firmware kit. Maybe you need to do that, reset switch during entire upload process, on every method of installation?

Vert, I think I saw you were using Octopi. This site doesn't have instructions, but I think that will be my next step.
Thank you for the new information about the 40 pin breakout. Where can I get that?

I've been flashing a variety of AVR boards for 10 years? I think. These are the worst boards to program that I have ever encountered.
This business with holding the reset combined with very unclear instructions on when to hold and when to release.

After three days of struggling with the poor instructions on this website, I'll try one more time to flash Marlin 2 tomorrow and report back here my results. Maybe I will increase my ratings on this printer when my level of frustration dies down.

Win10 current, verified ch340 driver on COMx

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Re: GT2560 V4 Connections for Installing Bootloader

Post by FranatiX » Tue Feb 18, 2020 2:30 am

I found a very easy way for me to flash a new firmware to this board using the Geeetech (Smatto) Firmware Upgrador from the Geeetech Download Area ;)

0. Power off the printer (and all other devices that use serial (COM) ports) and also close all programs that could try to connect to the printer, when it starts
1. Start Smatto and load the hex-file you want to flash. The Port should show up "Empty".
2. Power on the printer
3. Smatto will automatically switch to the COM-Port of your printer after about 2 seconds. In this moment you should click on "upgrade from local"

If Smatto shows timeouts you were to slow or possibly to fast. Then start again with 0. You will have max. about 1 second to start the upload.

Good luck :)

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